WordReference Random House Unabridged Dictionary of American English © 2026
sig′nal box′, [Brit.]
  1. Rail Transport, British Termsa railway signal tower.
  • 1820–30

Collins Concise English Dictionary © HarperCollins Publishers::
signal box n
  1. a control point for a large area of a railway system, operated electrically and semiautomatically
'signal box' also found in these entries (note: many are not synonyms or translations):
box - cabin - section - call box - towerman

Forum discussions with the word(s) "signal box" in the title:


Look up "signal box" at Merriam-Webster
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